projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 4a089752 MD |
1 | /* tracepoint-sample.c |
| 2 | * | |
| 3 | * Executes a tracepoint when /proc/tracepoint-example is opened. | |
| 4 | * | |
| 5 | * (C) Copyright 2007 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> | |
| 6 | * | |
| 7 | * This file is released under the GPLv2. | |
| 8 | * See the file COPYING for more details. | |
| 9 | */ | |
| 10 | ||
| 11 | #include <linux/module.h> | |
| 12 | #include <linux/sched.h> | |
| 13 | #include <linux/proc_fs.h> | |
| 14 | #include "tp-samples-trace.h" | |
| 15 | ||
| 7e066fb8 MD |
16 | DEFINE_TRACE(subsys_event); |
| 17 | DEFINE_TRACE(subsys_eventb); | |
| 18 | ||
| 4a089752 MD |
19 | struct proc_dir_entry *pentry_example; |
| 20 | ||
| 21 | static int my_open(struct inode *inode, struct file *file) | |
| 22 | { | |
| 23 | int i; | |
| 24 | ||
| 25 | trace_subsys_event(inode, file); | |
| 26 | for (i = 0; i < 10; i++) | |
| 27 | trace_subsys_eventb(); | |
| 28 | return -EPERM; | |
| 29 | } | |
| 30 | ||
| 31 | static struct file_operations mark_ops = { | |
| 32 | .open = my_open, | |
| 33 | }; | |
| 34 | ||
| 7ec7fb39 | 35 | static int __init example_init(void) |
| 4a089752 MD |
36 | { |
| 37 | printk(KERN_ALERT "example init\n"); | |
| 38 | pentry_example = proc_create("tracepoint-example", 0444, NULL, | |
| 39 | &mark_ops); | |
| 40 | if (!pentry_example) | |
| 41 | return -EPERM; | |
| 42 | return 0; | |
| 43 | } | |
| 44 | ||
| 7ec7fb39 | 45 | static void __exit example_exit(void) |
| 4a089752 MD |
46 | { |
| 47 | printk(KERN_ALERT "example exit\n"); | |
| 48 | remove_proc_entry("tracepoint-example", NULL); | |
| 49 | } | |
| 50 | ||
| 51 | module_init(example_init) | |
| 52 | module_exit(example_exit) | |
| 53 | ||
| 54 | MODULE_LICENSE("GPL"); | |
| 55 | MODULE_AUTHOR("Mathieu Desnoyers"); | |
| 56 | MODULE_DESCRIPTION("Tracepoint example"); |